CN102301787A - Mobile communication method and radio base station - Google Patents
Mobile communication method and radio base station Download PDFInfo
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- CN102301787A CN102301787A CN2010800062775A CN201080006277A CN102301787A CN 102301787 A CN102301787 A CN 102301787A CN 2010800062775 A CN2010800062775 A CN 2010800062775A CN 201080006277 A CN201080006277 A CN 201080006277A CN 102301787 A CN102301787 A CN 102301787A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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Abstract
A mobile communication method comprises a step wherein a mobile station (UE) which establishes a first connection in a first cell, performs a cell selection process when a malfunction is detected in the first connection, and transmits a connection reestablishment request signal to a second cell selected by the cell selection process; and a step wherein a radio base station managing the second cell judges whether or not the base station stores context information of the mobile station (UE) from which the connection reestablishment request signal has been transmitted, and acquires the context information of the mobile station (UE) from a radio base station managing the first cell when it is judged that the context information of the mobile station (UE) is not stored.
Description
Technical field
The present invention relates to method of mobile communication and wireless base station.
Background technology
With reference to Figure 14, illustrate in the mobile communication system of " LTE (Long Term Evolution) " mode of in 3GPP, stipulating that the mobile station UE that is set with RRC connection # 1 in the #1 of sub-district detects RLF (radio jink failure: the action in the time of Radio Link Failure).
As shown in figure 14, between mobile station UE and wireless base station eNB#1, be set with RRC and connect #1, under the state that is set with S1 connection # 1 between wireless base station eNB#1 and the board MME, mobile station UE is in step S5001, if detect RLF (radio jink failure: Radio Link Failure), then in step S5002, carry out cell selecting and handle (Cell Selection).
In step S5003, mobile station UE is to being used to manage wireless base station eNB#2 transmission " the RRC connection reconstruction request (RRC Connection Re-establishment Request) of handling the sub-district # 2 that selects by cell selecting.
Wireless base station eNB#2 is in step S5004, when store with received " request of RRC connection reconstruction " under the situation of context (context) information (UE context) of " physical area identity (the Physical Cell Identy) ", the mobile station UE that " C-RNTI " and " shortMAC-I " is corresponding that comprise, in step S5005, mobile station UE is sent " RRC connection reconstruction (RRC Connection Re-establishment) ".
In step S5006, mobile station UE sends " the RRC connection reconstruction is finished (RRC Connection Re-establishment Complete) " to wireless base station eNB#2.
Wireless base station eNB#2 sends " S1 path conversion (S1 Path Switch) " to board MME in step S5007, in step S5008, mobile station UE is sent " (RRC Connection Reconfiguration) reshuffled in the RRC connection ".
Among the step S5009, mobile station UE sends " the RRC connection is reshuffled and finished (RRC Connection Reconfiguration Complete) " to wireless base station eNB#2, in step S5010, board MME sends " (S1 Path Switch Ack) confirmed in the conversion of S1 path " to wireless base station eNB#2.
Its result finishes RRC and connects the switching of #1 to RRC connection # 2 and the switching that S1 connects #1 to S1 connection #2.Here, it is that the RRC that sets between mobile station UE and wireless base station eNB#2 connects that RRC connects #2, and it is that the S1 that sets between wireless base station eNB#2 and board MME connects that S1 connects #2.
Summary of the invention
The problem that invention will solve
But in this mobile communication system, mobile station UE only can be switched the wireless base station eNB subordinate's of the contextual information (UE context) that stores mobile station UE sub-district.
Thereby, do not have as above-mentioned wireless base station eNB#2 under the situation of contextual information of storing mobile station UE, above-mentioned " RRC connection reconstruction " is rejected, and exists mobile station UE can not set the problem points that RRC is connected #2 with being used to manage between the wireless base station eNB#2 that handles the sub-district # 2 that selects by cell selecting.
Therefore, the present invention finishes in view of the above problems, and its purpose is to provide the method for mobile communication and the wireless base station that can carry out setting again for the connection of the wireless base station of the contextual information that does not have storing mobile station (connecting again).
Be used to solve the method for problem
The 1st feature of the present invention is a method of mobile communication, its purport is, comprise: steps A, in the 1st sub-district, be set with the 1st travelling carriage that connects according to the signal that reconstructs from the wireless base station of managing the 1st sub-district, carry out the change of the 1st structure that connects and handle; Step B, described travelling carriage is handled under the case of successful in described change, be stored in the transaction identification information that comprises in the described architecture signals again, and the structure again that will comprise this transaction identification information of having stored is finished the wireless base station that signal sends to described the 1st sub-district of management; Step C, described travelling carriage carries out cell selecting and handles when detecting the described the 1st fault in connecting; Step D, described travelling carriage is handled the wireless base station of the 2nd sub-district of selecting by described cell selecting to management, send to connect and set request signal again, described connection is set request signal again and is comprised described transaction identification information and the security parameter that can determine described the 1st sub-district and described travelling carriage; Step e, whether the wireless base station judgement of managing described the 2nd sub-district stores and has sent the contextual information that this travelling carriage of request signal is set in described connection again; Step F, when the wireless base station of described the 2nd sub-district of management is judged to be under the situation of the contextual information of not storing described travelling carriage, the wireless base station of managing described the 1st sub-district is sent the context request signal that comprises described transaction identification information and described security parameter; Step G, received the wireless base station of described the 1st sub-district of management of described context request signal, based on described transaction identification information and described security parameter, determine the contextual information of this travelling carriage, and the contextual information of determined this travelling carriage is transmitted to the wireless base station of described the 2nd sub-district of management; And step H, based on the contextual information of described travelling carriage, manage the wireless base station of described the 2nd sub-district and the 2nd connection that described travelling carriage is set the 2nd sub-district that is used for this travelling carriage.
In the 1st feature of the present invention, also can be in described step e, the described transaction identification information that comprises in the request signal and the combination of described security parameter are set again based on described connection in the wireless base station of managing described the 2nd sub-district, judge the contextual information that whether stores described travelling carriage.
The 2nd feature of the present invention is the wireless base station, manage the 2nd sub-district, its purport is, comprise: identifying unit, based on setting transaction identification information that comprises in the request signal and the combination that can determine the security parameter of the 1st sub-district and this travelling carriage again, judge the contextual information that whether stores this travelling carriage from the connection of mailing to the 2nd sub-district that the 1st sub-district, is set with the 1st travelling carriage reception that connects; Obtain the unit, be judged to be by described identifying unit under the situation of the contextual information of not storing described travelling carriage,, obtain the contextual information of this travelling carriage from managing the wireless base station of described the 1st sub-district; And setup unit, contextual information based on described travelling carriage, set the 2nd of described the 2nd sub-district that is used for this travelling carriage with the cooperation of described travelling carriage and is connected, described transaction identification information is the identifying information that is updated under the situation that the change of the structure of the 1st connection described in the described travelling carriage has been handled successfully.
The 3rd feature of the present invention is the wireless base station, manage the 1st sub-district, its purport is, comprise: notification unit, when in described the 1st sub-district with travelling carriage between the change of the 1st structure that is connected set handle under the case of successful, upgrade transaction identification information, and, this transaction identification information after upgrading is notified to the wireless base station of management the 2nd sub-district arbitrarily regularly.
The invention effect
As described above like that, according to the present invention, can provide the method for mobile communication and the wireless base station that can carry out setting again (connecting again) for the connection of the wireless base station of the contextual information that does not have storing mobile station.
Description of drawings
Fig. 1 is the overall structure figure of the mobile communication system of the 1st execution mode of the present invention.
Fig. 2 is the functional-block diagram of the wireless base station of the 1st execution mode of the present invention.
Fig. 3 is the figure that is used for illustrating " shortMAC-I " that use in the mobile communication system of the 1st execution mode of the present invention.
Fig. 4 is the figure that is used for illustrating " the AS-context " that use in the mobile communication system of the 1st execution mode of the present invention.
Fig. 5 is the figure that is used for illustrating " request of RRC connection reconstruction " used in the mobile communication system of the 1st execution mode of the present invention.
Fig. 6 is the figure that is used for illustrating " X2 switches preparation (X2 HO Preparation) " of using in the mobile communication system of the 1st execution mode of the present invention.
Fig. 7 is the figure that is used for illustrating " the AS-configuration " that comprise in " X2 switches preparation " that the mobile communication system of the 1st execution mode of the present invention is used.
Fig. 8 is the sequential chart of action of the mobile communication system of expression the 1st execution mode of the present invention.
Fig. 9 is the sequential chart of action of the mobile communication system of expression the 1st execution mode of the present invention.
Figure 10 is the sequential chart of action of the mobile communication system of expression modification 1 of the present invention.
Figure 11 is the figure of action that is used to illustrate the mobile communication system of modification 1 of the present invention.
Figure 12 is the sequential chart of action of the mobile communication system of expression modification 1 of the present invention.
Figure 13 is the sequential chart of action of the mobile communication system of expression modification 2 of the present invention.
Figure 14 is a sequential chart of representing the action of mobile communication system in the past.
Embodiment
(structure of the mobile communication system of the 1st execution mode of the present invention)
Referring to figs. 1 through Fig. 7, the structure of the mobile communication system of the 1st execution mode of the present invention is described.
As shown in Figure 1, the mobile communication system of present embodiment is the mobile communication system of LTE mode, has the wireless base station eNB#1 of board MME, management sub-district # 1, the wireless base station eNB#2 of management sub-district # 2.
In this mobile communication system, mobile station UE only can be switched the wireless base station eNB subordinate's of the contextual information that stores mobile station UE sub-district.That is, be suitable for " oppositely switching (Backward Handover) ".
In addition, the present invention is not only applicable to the mobile communication system of LTE mode, goes for carrying out the mobile communication system arbitrarily of the switching between the wireless base station eNB.
As shown in Figure 2, wireless base station eNB has UE context memory cell 11, RRC (Radio Resource control) processing unit 12, identifying unit 13, MAC (medium access control) processing unit 14, X2 processing unit 15, S1 processing unit 16.Below, represent wireless base station eNB and the structure of the wireless base station eNB#2 that is used to manage sub-district #2 (the 2nd sub-district) is described.
UE context memory cell 11 as the contextual information of mobile station UE and be stored in the wireless base station eNB can unique definite mobile station UE " PCI (physical district ID: Physical Cell ID) ", " C-RNTI ", " shortMAC-I " and " transId ".
" PCI " is the identifier that needs for identification sub-district in physical layer, in the LTE mode, reuses 504 groups " PCI ".In addition, " C-RNTI " is the identifier that is used for unique identification mobile station UE in the sub-district.
Here, as shown in Figure 3, " shortMAC-I " utilizes " VarShortMAC-Input " that is made of " sub-district ID (ID that broadcasts in the sub-district of attempting to set again) ", " PCI (PCI of the sub-district of RLF has taken place) ", " C-RNTI (C-RNTI that utilizes) " and the security parameter of 16 bits that generate in the sub-district that RLF has taken place.
Specifically, " shortMAC-I " is the parameter of " VarShortMAC-Input " having been extracted low level 16 bits of distorting check code " MAC-I " that utilize safe key that current mobile station UE uses and security algorithm and calculate.
In addition, " transId " be otherwise known as " rrc-TransactionIdentifier ".
In addition, the contextual information of mobile station UE comprise the information relevant, the set information relevant etc. with the wireless mensuration of mobile station UE with the radio bearer that current mobile station UE is set, with the relevant various information of setting of mobile station UE.
For example, can comprise " ue-RadioAccessCapabilityInfo ", " ue-Securitycapabilityinfo " that comprises as shown in Figure 4, " AS-Context " of " reestablishmentInfo " etc. in the contextual information of mobile station UE.
In addition, " transId " manages each connection, and the identifying information that upgrades under the situation that the change of each structure that connects has been handled successfully in mobile station UE." transId " that comprises in the downstream message that mobile station UE keeps successfully handling.The value that " transId " that comprise in the downstream message set is the freedom of wireless base station eNB, but the utilization that normally increases during each processing (reshuffling).
In addition, in reshuffling, carry out appending/delete or the variation of parameter of radio bearer or the setting of wireless mensuration etc. of radio bearer.
RRC processing unit 12 is cooperated with the RRC function of mobile station UE and is carried out the RRC processing.
For example, RRC processing unit 12 receives " request of RRC connection reconstruction (connect and set request signal again) ", " the RRC connection reconstruction is finished (connect to set again and finish signal) ", " the RRC connection is reshuffled and finished (connection reconstructs and finishes signal) " of the sub-district (for example sub-district #2) of mailing to the subordinate from mobile station UE.
In addition, 12 pairs of mobile station UE of RRC processing unit send " RRC connection reconstruction (connecting setting signal again) ", " (connection reconstructs signal) reshuffled in the RRC connection ".
In addition, RRC processing unit 12 is cooperated with mobile station UE based on the contextual information of mobile station UE, the above-mentioned RRC message of exchange promptly and between the mobile station UE, thus the RRC that sets the sub-district # 2 that is used for mobile station UE connects #2.
Here, Fig. 5 represents the example of the form of this " request of RRC connection reconstruction ".
Identifying unit 13 is judged the contextual information that whether stores mobile station UE in the UE context memory cell 11 according to " request of RRC connection reconstruction " that received by RRC processing unit 12.
Specifically, identifying unit 13 is judged the contextual information that whether stores the mobile station UE corresponding with " PCI " and " C-RNTI " and " shortMAC-I " and " transId " that comprise in the UE context memory cell 11 in " request of RRC connection reconstruction " that received by RRC processing unit 12.
MAC processing unit 14 is cooperated with the MAC function of mobile station UE and is carried out the MAC processing.
X2 processing unit 15 play with other wireless base station (for example, wireless base station eNB#1) between interface function.
For example, when being judged to be by identifying unit 13 under the situation of the contextual information that does not have storing mobile station UE, X2 processing unit 15 is obtained the contextual information of mobile station UE from the wireless base station eNB# 1 of management sub-district # 1.
Specifically, when being judged to be by identifying unit 13 under the situation of the contextual information that does not have storing mobile station UE, 15 couples of wireless base station eNB# 1 of X2 processing unit send " the transmitting handoff request (Forward HO Request) (forwarding switching request signal) " that comprises " PCI ", " C-RNTI ", " shortMAC-I " and " transId ", thereby, obtain the contextual information of mobile station UE via " X2 switches preparation (X2 HO Preparation) (switching ready signal) ".
Here, Fig. 6 and Fig. 7 represent the example of the form of this " X2 HO Preparation ".
For example, 16 couples of board MME of S1 processing unit send " conversion of S1 path ", and receive " conversion of S1 path is confirmed " from board MME.
(action of the mobile communication system of the 1st execution mode of the present invention)
The 1st, with reference to Fig. 8, the action example 1 of the mobile communication system of the 1st execution mode of the present invention is described.
As shown in Figure 8, between mobile station UE and wireless base station eNB# 1, set RRC and be connected #1, being set with S1 between wireless base station eNB# 1 and the board MME is connected under the state of #1, in step S1001, the wireless base station eNB# 1 of management sub-district # 1 is in order to change the structure that is connected (radio bearer) of (also comprise append with discharge) mobile station UE, mobile station UE is sent comprises " the RRC connection is reshuffled " of " transId (=n) ".
Mobile station UE is according to " the RRC connection is reshuffled ", the change of the structure that connects (is for example handled, appending or deletion etc. of radio bearer), and under this change processing case of successful, in step S1002, wireless base station eNB# 1 is sent " the RRC connection is reshuffled and finished " that is used to represent this intention.
In step S1003B, before comprising of mobile station UE being sent by wireless base station eNB# 1 " transId (=n+1) " " RRC connect reshuffle " arrives mobile station UE, mobile station UE is then carried out cell selecting and is handled if detect RLF (RRC connects the fault among the #1) in step S1003A in step S1004.
For example, mobile station UE connects desynchronizing state among the #1 detecting RRC for N310 time, and after this, starts timer T310, and this desynchronizing state not have to detect RLF under the situation of elimination before timer T310 expiration.
In step S1005, mobile station UE is handled the wireless base station eNB# 2 of the sub-district # 2 selects to management by cell selecting, and transmission comprises " request of RRC connection reconstruction " of " PCI ", " C-RNTI ", " shortMAC-I " and " transId (=n) ".
Comprised by " request of RRC connection reconstruction " this moment and send the low-order bit that " transId " can only be " transId " that comprise in the mobile station UE " RRC connect reshuffle " that receive in step S1001.
Wireless base station eNB# 2 is judged to be " PCI " that comprises in " request of RRC connection reconstruction " of not storing and receiving in step S1006, " C-RNTI ", under the situation of the contextual information of the mobile station UE that " shortMAC-I " and " transId (=n) " is corresponding, in step S1007, based on " PCI " that comprise in " request of RRC connection reconstruction " that receive, determine wireless base station eNB# 1, and to wireless base station eNB# 1, transmission comprises above-mentioned " PCI ", " C-RNTI ", " forwarding handoff request " (also can be called as " UE context request " and wait other title) of " shortMAC-I " and " transId (=n) ".
Wireless base station eNB# 1 is in step S1008, be judged to be under the situation of the contextual information that stores the mobile station UE corresponding with " PCI ", " C-RNTI ", " shortMAC-I " that comprise and " transId (=n) " in " the forwarding handoff request " that receive, in step S1009, wireless base station eNB# 2 is sent " X2 switches preparations " (under situation that is judged to be the contextual information that does not store mobile station UE, replace " X2 switches preparation " and send " the forwarding switching is refused ") of the contextual information comprise this mobile station UE.
In step S1010, wireless base station eNB# 2 sends " RRC connection reconstruction " to mobile station UE.
Here, under the situation of having returned " transmit and switch refusal " from wireless base station eNB# 1, the transmission that replaces " RRC connection reconstruction refusal ".Thus, connect to set again and end in failure, mobile station UE discharges RRC and connects, and becomes " RRC_ free time (RRC_IDLE) state ".
In step S1011, mobile station UE sends " the RRC connection reconstruction is finished " to wireless base station eNB# 2.
Wireless base station eNB# 2 sends " X2 switches preparation and confirms " to wireless base station eNB# 1 in step S1012, and in step S1013, board MME is sent " conversion of S1 path ", and in step S1014, mobile station UE sent comprise " RRC connect reshuffle " of " transId (=n+1) ".This moment " transId " is worth arbitrarily.
In step S1015, mobile station UE is according to being somebody's turn to do " the RRC connection is reshuffled ", the change of the structure that connects is handled, and under this change processing case of successful, wireless base station eNB# 2 is sent " the RRC connection is reshuffled and finished ", and in step S1016, board MME sends " conversion of S1 path is confirmed " to wireless base station eNB# 2.
Its result, RRC connect the switching of #1 to RRC connection # 2 and the switching of S1 connection # 1 to S1 connection # 2 is finished.Here, it is that the RRC that sets between mobile station UE and wireless base station eNB# 2 is connected that RRC connects #2, and S1 connection # 2 is that the S1 that sets between wireless base station eNB# 2 and board MME is connected.
The 2nd, with reference to Fig. 9, the action example 2 of the mobile communication system of the 1st execution mode of the present invention is described.
As shown in Figure 9, between mobile station UE and wireless base station eNB# 1, be set with RRC and be connected #1, and being set with S1 between wireless base station eNB# 1 and the board MME is connected under the state of #1, in step S2001, the wireless base station eNB# 1 of management sub-district #1 (for example handles for the change of the structure of the connection of carrying out mobile station UE, appending and deletion etc. of radio bearer), mobile station UE sent comprise " RRC connect reshuffle " of " transId (=n) ".
Mobile station UE is according to " RRC connect reshuffle ", and the change of the structure that connects is handled, and under the situation that this change has been handled successfully, in step S2002, wireless base station eNB# 1 is sent " the RRC connection is reshuffled and finished " of representing its intention.
In step S2003, wireless base station eNB# 1 sends and comprises " RRC connect reshuffle " of " transId (=n+1) " to mobile station UE.
Mobile station UE is according to " the RRC connection is reshuffled ", the change of the structure that connects is handled, and under this change processing case of successful, in step S2004, wireless base station eNB# 1 is sent " the RRC connection is reshuffled and finished " of its intention of expression, but, then in step S2006, carry out the cell selecting processing if mobile station UE detects step RLF (RRC connects the fault among the #1) before being somebody's turn to do " the RRC connection is reshuffled and finished " arrival wireless base station eNB# 1 in step S2005.
In step S2007, mobile station UE is handled the wireless base station eNB# 2 of the sub-district # 2 selects to management by cell selecting, and transmission comprises " request of RRC connection reconstruction " of " PCI ", " C-RNTI ", " shortMAC-I " and " transId (=n+1) ".
" transId " that is comprised in " request of RRC connection reconstruction " this moment and sends can only be the low-order bit of " transId " that comprise in the mobile station UE " RRC connect reshuffle " that receive in step S2003.
Wireless base station eNB# 2 is judged to be " PCI " that comprises in " request of RRC connection reconstruction " of not storing and receiving in step S2008, " C-RNTI ", under the situation of the contextual information of the mobile station UE that " shortMAC-I " and " transId (=n+1) " is corresponding, in step S2009, based on " PCI " that comprise in " request of RRC connection reconstruction " that receive, determine wireless base station eNB# 1, and to wireless base station eNB# 1, transmission comprises above-mentioned " PCI ", " C-RNTI ", " forwarding handoff request " (be otherwise known as " UE context request " waits other title) of " shortMAC-I " and " transId (=n+1) ".
Wireless base station eNB# 1 is judged to be in step S2010 under the situation of the contextual information that stores the mobile station UE corresponding with " PCI ", " C-RNTI ", " shortMAC-I " that comprise and " transId (=n+1) " in " the forwarding handoff request " that receive, in step S2011, wireless base station eNB# 2 is sent " X2 switches preparations " (under situation that is judged to be the contextual information that does not store mobile station UE, replace " X2 switches preparation " and send " the forwarding switching is refused ") of the contextual information comprise this mobile station UE.
In step S2012, wireless base station eNB# 2 sends " RRC connection reconstruction " to mobile station UE.
Here, under the situation of having returned " transmit and switch refusal " from wireless base station eNB# 1, the transmission that replaces " RRC connection reconstruction refusal ".Thus, connect to set again and end in failure, travelling carriage discharges RRC and connects, and becomes " RRC_ idle condition ".
In step S2013, mobile station UE sends " the RRC connection reconstruction is finished " to wireless base station eNB# 2.
Wireless base station eNB# 2 is in step S2014, wireless base station eNB# 1 is sent " X2 switches preparation and confirms ", and in step S2015, board MME is sent " conversion of S1 path ", and in step S2016, mobile station UE sent comprise " RRC connect reshuffle " of " transId (=n+2) ".This moment " transId " is worth arbitrarily.
In step S2017, mobile station UE is according to being somebody's turn to do " the RRC connection is reshuffled ", the change of the structure that connects is handled, and under the situation that this change has been handled successfully, wireless base station eNB# 2 is sent " the RRC connection is reshuffled and finished ", and at step S2018, board MME sends " conversion of S1 path is confirmed " to wireless base station eNB# 2.
Its result, RRC connect the switching of #1 to RRC connection # 2 and the switching of S1 connection # 1 to S1 connection # 2 is finished.Here, it is that the RRC that sets between mobile station UE and wireless base station eNB# 2 is connected that RRC connects #2, and S1 connection # 2 is that the S1 that sets between wireless base station eNB# 2 and board MME is connected.
In having the mobile communication system of a plurality of carryings, same sometimes wireless base station eNB covers the different a plurality of sub-districts of utilization carrying.At this moment, identical " PCI " of utilization in the sub-district of supposing to cover.
Mobile station UE is carried out cell selecting detecting under the situation of RLF, but also can select the sub-district of different bearer this moment.Thereby, only have problem by the contextual information of " PCI " and " C-RNTI " can not unique definite wireless base station eNB interior mobile station UE.
Here, as mentioned above, " shortMAC-I " is the parameter of " VarShortMAC-Input " having been extracted low level 16 bits of distorting check code " MAC-I " that utilize safe key that current mobile station UE using and security algorithm and calculate.
Safe key is to each mobile station UE and difference, and, when changing at every turn, the sub-district of communication is updated.Thereby in the sub-district of the different bearer that uses identical " PCI ", even hypothesis has the mobile station UE of utilizing identical " C-RNTI ", safe key is also different.Thereby, by using " shortMAC-I ", the contextual information of the mobile station UE in can unique definite wireless base station eNB.
Also comprise " shortMAC-I " in " forwarding handoff request ", thereby in wireless base station eNB# 1, can determine the contextual information of mobile station UE.
In addition, in " RRC connects reconfiguration request " and " forwarding handoff request ", comprise " transId ", thereby in wireless base station eNB# 1, can discern the state (state of the structure of connection) of the contextual information of mobile station UE exactly.
(effect of the mobile communication system of the 1st execution mode of the present invention, effect)
Mobile communication system according to the 1st execution mode of the present invention, even wireless base station eNB# 2 is under the situation of the contextual information that does not have storing mobile station UE, also can obtain the contextual information of mobile station UE from wireless base station eNB# 1, so mobile station UE can connect again and sets (connecting) again to the wireless base station eNB# 2 of the contextual information that do not have storing mobile station UE.
In addition, mobile communication system according to the 1st execution mode of the present invention, detect before under the situation that RRC connects the RLF among the #1 even receive " RRC connect reshuffle " that sent by wireless base station eNB# 1 in mobile station UE, mobile station UE and wireless base station eNB# 1 and wireless base station # 2 also can discern the state of the structure that is connected of mobile station UE exactly.
And, mobile communication system according to the 1st execution mode of the present invention, even before " the RRC connection is reshuffled and finished " that sent by mobile station UE arrives wireless base station eNB# 1, mobile station UE detects under the situation that RRC connects the RLF among the #1, and mobile station UE and wireless base station eNB# 1 and wireless base station eNB# 2 also can discern the state of the structure that is connected of mobile station UE exactly.
(modification 1 of the present invention)
With reference to Figure 10 to Figure 12, the mobile communication system of modification 1 of the present invention is described.Below, at the mobile communication system of this modification 1, stress difference with the mobile communication system of the 1st above-mentioned execution mode.
In the mobile communication system of this modification 1, mobile station UE is utilized random access procedure, to handling the wireless base station eNB# 2 that selects by cell selecting, sends " request of RRC connection reconstruction ".
Here, with reference to Figure 10 and Figure 11, this action is described.
As shown in figure 10, in step S3001, mobile station UE sends random access lead code to wireless base station eNB# 2.
In step S3002, wireless base station eNB# 2 sends accidental access response according to the random access lead code that receives to mobile station UE.Here, wireless base station eNB# 2 sends accidental access response via the PDCCH that comprises RA-RNTI to mobile station UE.
In step S3003, the ascending wireless resource of mobile station UE utilization appointment by accidental access response (UL permission) sends " request of RRC connection reconstruction ".HARQ (hybrid ARQ) is used in the transmission of this " request of RRC connection reconstruction " to be handled.
In step S3004, wireless base station eNB# 2 sends " competition solves (Contention Resolution) " according to the reception of " request of RRC connection reconstruction ".
In step S3005, wireless base station eNB# 2 sends " the RRC connection reconstruction " of conduct for the response signal of " request of RRC connection reconstruction ".HARQ is used in the transmission of this " RRC connection reconstruction " to be handled.
In addition, before the expiration of the CR that the MAC processing unit 14 of wireless base station eNB# 2 starts (competition solves) timer (fixedly timer), send " competition solves " when mobile station UE sends " request of RRC connection reconstruction ".
Here, the MAC processing unit 14 of wireless base station eNB# 2 can connect transmission " competition solves " and " RRC connection reconstruction " like that in identical TTI (transmission time interval) shown in Figure 11 (a), also can send " compete and solve " and " RRC connection reconstruction " shown in Figure 11 (b) like that respectively.
In addition, the MAC processing unit 14 of wireless base station eNB# 2 duplicates " request of RRC connection reconstruction " that receives in the field of Figure 11 (a) and Figure 11 (b) " competition solves ".
In addition, mobile station UE, is at first judged in the control information that sends via the PDCCH that comprises Temp-C-RNTI after the transmission " request of RRC connection reconstruction " by random access procedure, whether is included " competition solves ".
Temp-C-RNTI is the interim C-RNRI (identifier of the mobile station UE in the sub-district) that distributes according to accidental access response.
Specifically, mobile station UE is in this control information, can shown in Figure 11 (a), establish like that since the field of the 3rd or the 4th byte (byte) " competition solves ", be regardless of parsing MAC header and MAC extension header and just judge whether include " competition solves ", also can shown in Figure 11 (b), establish like that since the field of the 2nd byte " competition solves ", be regardless of the parsing MAC header and just judge whether include " competition solves ".
" competition solves " used HARQ, but owing to existing a plurality of mobile station UE to insert the possibility of conflicting simultaneously at random, therefore handle different with the MAC of common HARQ, mobile station UE only under the situation of having confirmed " request of RRC connection reconstruction " quilt of own transmission " competition solves " loopback, sends the feedback that HARQ confirms.
In addition under the situation (under the situation of decoding failure and HARQ Negative Acknowledgement and under the inconsistent situation of echo check content of " competition solves "), mobile station UE does not send the ack/nack feedback of HARQ.
But the feedback of HARQ need be in the timed sending of satisfying the RTT (two-way time) that HARQ moves.Thereby strict for processing speed can not be obtained the processing time that is used to analyze mac header.
Thereby, the expectation mobile station UE be regardless of just decision of parsing MAC header " competition solution " thus byte directly carry out the comparison of the Bit String (bit string) of echo check content.
Below, with reference to Figure 12, the action of the mobile communication system of this modification 1 is described.
As shown in figure 12, between mobile station UE and wireless base station eNB# 1, be set with RRC and be connected #1, being set with S1 between wireless base station eNB# 1 and the board MME is connected under the state of #1, if mobile station UE detects RLF (RRC connects the fault among the #1) in step S4001, then in step S4002, carry out cell selecting and handle.
In step S4003, mobile station UE is handled the wireless base station eNB# 2 of the sub-district # 2 selects to management by cell selecting, and transmission comprises " request of RRC connection reconstruction " of " PCI " and " C-RNTI " and " shortMAC-I " and " transId (=n) ".
At this moment, in step S4003A, the arbitrarily timing of wireless base station eNB# 2 before the CR timer expiration sends " competition solves " to mobile station UE.
The action of step S4004 to S4014 is identical with the action of step S1006 to S1016 shown in Figure 8.
In addition, under the situation of " RRC connection reconstruction " the no show mobile station UE among the step S4008 before the timer T301 expiration, mobile station UE is judged to be the setting failure of the RRC connection # 2 among the #2 of sub-district.At this moment, mobile station UE discharges RRC and connects, and becomes " RRC_ idle condition ".
Below, effect, the effect of the mobile communication system of this modification 1 are described.
In the mobile communication system of the 1st execution mode of the present invention, when wireless base station eNB# 2 has received from mobile station UE under the situation of contextual information of " request of RRC connection reconstruction " and " PCI " and " C-RNTI " and " shortMAC-I " that not do not comprised storage and this " request of RRC connection reconstruction " and " transId (=n) " corresponding mobile station UE, need obtain the contextual information of mobile station UE from wireless base station eNB# 1.
Thereby, if wireless base station eNB# 2 connects transmission " RRC connection reconstruction " and " competition solves " in identical TTI, even then " competition solves " no show mobile station UE and " request of RRC connection reconstruction " normally arrive under the situation of wireless base station eNB# 2 before the CR timer expiration, also can repeat random access procedure sometimes.
Therefore, as the mobile communication system of this modification 1, by the timing arbitrarily before the CR timer expiration, wireless base station eNB# 2 sends " competition solves " to mobile station UE, thereby can eliminate this defective.
Especially receiving " request of RRC connection reconstruction " from mobile station UE and not under the situation of the contextual information of storing mobile station UE, wireless base station eNB# 2 preferably before the CR timer expiration arbitrarily regularly, mobile station UE is sent " competition solves ".
(modification 2 of the present invention)
With reference to Figure 13, the mobile communication system of modification 2 of the present invention is described.Below, at the mobile communication system of this modification 1, stress difference with the mobile communication system of the 1st above-mentioned execution mode.
In the mobile communication system of this modification 2, in the #1 of sub-district with mobile station UE between the change of the structure that is connected set handle under the case of successful, X2 processing unit 15 changes " transId " of wireless base station eNB# 1, in timing arbitrarily, wireless base station eNB# 2 is sent " switch and prepare " that comprises " transId " that upgraded, thereby " transId " that notice has been upgraded.
In addition, the UE context memory cell 11 of wireless base station eNB# 2 is upgraded " transId " corresponding with the contextual information of the mobile station UE of storing according to " " transId " that comprise among the transId (" switch and prepare ") " by wireless base station eNB# 1 notice.
Below, with reference to Figure 13, the action of the mobile communication system of modification 2 of the present invention is described.
As shown in figure 13, between mobile station UE and wireless base station eNB# 1, be set with RRC and be connected #1, being set with S1 between wireless base station eNB# 1 and the board MME is connected under the state of #1, in step S4101, the wireless base station eNB# 1 of management sub-district #1 (for example handles for the change of the structure of the connection of carrying out mobile station UE, appending and deletion etc. of radio bearer), mobile station UE sent comprise " RRC connect reshuffle " of " transId (=n) ".
Mobile station UE basis " the RRC connection is reshuffled ", the change processing of the structure that connects, and under this change processing case of successful, in step S4102, " the RRC connection is reshuffled and finished " of its intention represented in transmission to wireless base station eNB# 1.
Here, in step S4103, wireless base station eNB# 1 considers the generation of unexpected RLF, to wireless base station eNB# 2 as peripheral wireless base station, and " switch and prepare " of " transId (=n) " after timed sending comprises renewal arbitrarily.
Wireless base station eNB# 2 upgrades the contextual information of mobile station UE, and in step S4104, wireless base station eNB# 1 is sent " switch and prepare to confirm " based on " transId (=n) " that comprise in " switch prepare " that receive.
In step S4105, wireless base station eNB# 1 handles (for example, radio bearer append and deletion etc.) for the change of the structure of the connection of carrying out mobile station UE, mobile station UE is sent comprises " RRC connect reshuffle " of " transId (=n+1) ".
Mobile station UE is according to " the RRC connection is reshuffled ", carrying out the change of the structure of this connection handles, and under this change processing case of successful, in step S4106, wireless base station eNB# 1 is sent " the RRC connection is reshuffled and finished " of its intention of expression, but if should " the RRC connection is reshuffled and finished " arrive before the wireless base station eNB# 1, mobile station UE detects step RLF (RRC connects the fault among the #1) in step S4107, then carry out cell selecting and handle in step S4108.
In step S4109, the wireless base station eNB# 2 transmission that mobile station UE is handled the sub-district # 2 selects to management by cell selecting comprises " request of RRC connection reconstruction " of " PCI " and " C-RNTI " and " shortMAC-I " and " transId (=n+1) ".
Wireless base station eNB# 2 judges the contextual information whether store the mobile station UE corresponding with " PCI " and " C-RNTI " and " shortMAC-I " that comprise and " transId (=n+1) " in " request of RRC connection reconstruction " that receive in step S4110.
In the example of Figure 13, wireless base station eNB# 2 stores the contextual information of the mobile station UE corresponding with " PCI " and " C-RNTI " and " shortMAC-I " that comprise in " request of RRC connection reconstruction " that receive.
But, because it is different with " transId (=n+1) " that comprise in corresponding " transId (=n) " of the contextual information of this mobile station UE and " request of RRC connection reconstruction " that receive, therefore under the situation of the up-to-date contextual information of the mobile station UE that wireless base station eNB# 2 " PCI " and " C-RNTI " and " shortMAC-I " that comprise in being judged to be not storage and " request of RRC connection reconstruction " that receive is corresponding, in step S4111, based on " PCI " that comprise in " request of RRC connection reconstruction " that receive, determine wireless base station eNB# 1, and wireless base station eNB# 1 is sent " the forwarding handoff request " comprise above-mentioned " PCI " and " C-RNTI " and " shortMAC-I " and " transId (=n+1) ".
Below, the action of step S4112 to S4120 is identical with the action of step S2010 to S2018 shown in Figure 9.
More than the feature of Xu Shu present embodiment also can followingly show.
The 1st feature of present embodiment is a method of mobile communication, its purport is, comprise: steps A, the mobile station UE basis that is set with RRC connection #1 (the 1st connects) in sub-district #1 (the 1st sub-district) connects " (reconstructing signal) reshuffled in the RRC connection " of the wireless base station eNB#1 of #1 from management RRC, carry out the change processing that RRC connects the structure of #1; Step B, mobile station UE is handled under the case of successful in this change, be stored in " transId (the transaction identification information) " that comprises in " RRC connect reshuffle ", and " RRC connect to reshuffle finish (reconstruct and finish signal) " that will comprise " transId " that stored sends to wireless base station eNB#1 that management RRC connects #1; Step C, mobile station UE is carried out cell selecting and is handled when detecting RRC and connect fault (RLF) among the #1; Step D, mobile station UE is handled the wireless base station eNB#2 of the sub-district #2 (the 2nd sub-district) that selects by cell selecting to management, send " request of RRC connection reconstruction (connect and set request signal again) ", " request of RRC connection reconstruction " comprises " transId " and " shortMAC-I (security parameter) " that can determine sub-district #1 and mobile station UE; Step e, the wireless base station eNB#2 of management sub-district #2 judges the contextual information that whether stores the mobile station UE that has sent " request of RRC connection reconstruction "; Step F, when the wireless base station eNB#2 of management sub-district #2 is judged to be under the situation of the contextual information that does not have storing mobile station UE, the wireless base station eNB#1 transmission of management sub-district #1 is comprised " the transmitting handoff request (context request signal) " of " transId " and " shortMAC-I "; Step G, received the wireless base station eNB#1 of the management sub-district #1 of " forwarding handoff request ", based on " transId " and shortMAC-I ", determine the contextual information of mobile station UE, and the contextual information of determined mobile station UE is transmitted to the wireless base station eNB#2 of management sub-district #2; And step H, based on the contextual information of mobile station UE, the RRC that the wireless base station eNB#2 of management sub-district #2 and mobile station UE are set the sub-district #2 that is used for mobile station UE connects #2.
In the 1st feature of present embodiment, in step e, the wireless base station eNB# 2 of management sub-district # 2 also can judge the contextual information that whether stores mobile station UE based on " transId " that comprise in " request of the RRC connection reconstruction " combination with " shortMAC-I ".
In the 1st feature of present embodiment, step D also can comprise: step D1, and mobile station UE sends random access lead code to wireless base station eNB# 2; Step D2, wireless base station eNB# 2 send accidental access response according to the random access lead code that receives to mobile station UE; Step D3, the mobile station UE utilization sends " request of RRC connection reconstruction " according to accidental access response and the resource of appointment; And step D4, wireless base station eNB# 2 is according to the reception of " request of RRC connection reconstruction ", send " competition solves (conflict solves signal) ", in step D4, before the CR timer that wireless base station eNB# 2 starts in step D1 (regulation timer) expiration, with for the response signal of " request of RRC connection reconstruction " promptly " RRC connection reconstruction " separate and send " competition solution ".
In the 1st feature of present embodiment, do not detect under the situation of the fault (RLF) among the RRC connection # 1 at the wireless base station eNB# 1 of management sub-district # 1 even can also comprise the steps:, in timing arbitrarily, also the wireless base station eNB# 2 of management sub-district # 2 is sent " switch and prepare " of up-to-date " transId " that comprise in the mobile station UE, thereby up-to-date " transId " in the notice mobile station UE.
The 2nd feature of present embodiment is wireless base station eNB# 2, management sub-district # 2, its purport is, comprise: identifying unit 13, based on connecting " transId " and the shortMAC-I that comprises in " request of RRC connection reconstruction " of mailing to sub-district # 2 that the mobile station UE of #1 receives among the #1 of sub-district, being set with RRC " combination, judge the contextual information that whether stores mobile station UE; X2 processing unit 15 is being judged to be by identifying unit 13 under the situation of the contextual information that does not have storing mobile station UE, from the wireless base station eNB# 1 of management sub-district # 1, obtains the contextual information of mobile station UE; And RRC processing unit 12, contextual information based on mobile station UE, the RRC that sets the sub-district # 2 that is used for mobile station UE with mobile station UE cooperation is connected #2, and " transId " is the identifying information that is updated under the change of the structure of RRC connection in the mobile station UE situation about having handled successfully.
In the 2nd feature of present embodiment, can also constitute, comprise MAC processing unit 14, according to the random access lead code that receives from mobile station UE, mobile station UE is sent accidental access response, and the reception of " request of RRC connection reconstruction " that receive according to resource from travelling carriage utilization appointment by accidental access response, send " competition solves ", before the CR timer expiration that MAC processing unit 14 starts when mobile station UE sends " request of RRC connection reconstruction ", with for the response signal of " request of RRC connection reconstruction " promptly " RRC connection reconstruction " separate and send " competition solution ".
In the 2nd feature of present embodiment, can also comprise UE context memory cell 11, " transId (" transId " that comprise in " switch and prepare ") " according to the wireless base station eNB# 1 by management sub-district # 1 notifies upgrades " transId " corresponding with the contextual information of the mobile station UE of storing.
The 3rd feature of present embodiment is wireless base station eNB# 1, management sub-district # 1, its purport is, comprise: X2 processing unit 15, when in the #1 of sub-district with mobile station UE between the RRC that the setting change that is connected the structure of #1 handle under the case of successful, upgrade " transId ", and in timing arbitrarily, to the wireless base station eNB# 2 of management sub-district # 2, transmission comprises " switch and prepare " of " transId " after the renewal, thereby " transId " behind the update notifications.
In addition, the action of above-mentioned mobile station UE and wireless base station eNB# 1/eNB# 2 and board MME can be implemented by hardware, also can implement by the software module of being carried out by processor, also can implement by both combinations.
Software module can be arranged in the storage medium of the such arbitrary form of RAM (random access memory), flash memory, ROM (read-only memory), EPROM (EPROM (Erasable Programmable Read Only Memory)), EEPROM (EEPROM (Electrically Erasable Programmable Read Only Memo)), register, hard disk, displacement disc, CD-ROM.
This storage medium is connected to processor, so that this processor can be to this storage medium reading writing information.In addition, this storage medium also can be integrated in the processor.In addition, this storage medium and processor also can be arranged in the ASIC.This ASIC can be arranged in mobile station UE, wireless base station eNB# 1/eNB# 2 and the board MME.In addition, this storage medium and processor also can be used as discrete parts and are arranged in mobile station UE, wireless base station eNB# 1/eNB# 2 and the board MME.
More than, utilize above-mentioned execution mode to describe the present invention in detail, but to those skilled in the art, should be understood that the execution mode that the present invention is not limited to illustrate in this manual.The present invention can be as revising and alter mode is implemented and do not broken away from aim of the present invention and scope that record determined by claims.Thereby the record of this specification is a purpose to illustrate, and the present invention is not had the meaning of any restriction.
Claims (8)
1. a method of mobile communication is characterized in that, comprising:
Steps A is set with the 1st travelling carriage that connects according to the signal that reconstructs from the wireless base station of managing the 1st sub-district in the 1st sub-district, carry out the change of the 1st structure that connects and handle;
Step B, described travelling carriage is handled under the case of successful in described change, be stored in and describedly reconstruct the transaction identification information that comprises in the signal, and will comprise the reconstructing of this transaction identification information of having stored and finish the wireless base station that signal sends to described the 1st sub-district of management;
Step C, described travelling carriage carries out cell selecting and handles when detecting the described the 1st fault in connecting;
Step D, described travelling carriage is handled the wireless base station of the 2nd sub-district of selecting by described cell selecting to management, send to connect and set request signal again, described connection is set request signal again and is comprised described transaction identification information and the security parameter that can determine described the 1st sub-district and described travelling carriage;
Step e, whether the wireless base station judgement of managing described the 2nd sub-district stores and has sent the contextual information that this travelling carriage of request signal is set in described connection again;
Step F, when the wireless base station of described the 2nd sub-district of management is judged to be under the situation of the contextual information of not storing described travelling carriage, the wireless base station of managing described the 1st sub-district is sent the context request signal that comprises described transaction identification information and described security parameter;
Step G, received the wireless base station of described the 1st sub-district of management of described context request signal, based on described transaction identification information and described security parameter, determine the contextual information of this travelling carriage, and the contextual information of determined this travelling carriage is transmitted to the wireless base station of described the 2nd sub-district of management; And
Step H based on the contextual information of described travelling carriage, manages the wireless base station of described the 2nd sub-district and the 2nd connection that described travelling carriage is set the 2nd sub-district that is used for this travelling carriage.
2. method of mobile communication as claimed in claim 1 is characterized in that,
In described step e, the described transaction identification information that comprises in the request signal and the combination of described security parameter are set again based on described connection in the wireless base station of managing described the 2nd sub-district, judge the contextual information that whether stores described travelling carriage.
3. method of mobile communication as claimed in claim 1 is characterized in that,
Described step D comprises:
Step D1, described travelling carriage sends random access lead code to managing the wireless base station of described the 2nd sub-district;
Step D2, the wireless base station of managing described the 2nd sub-district sends accidental access response according to the described random access lead code that receives to described travelling carriage;
Step D3, described travelling carriage utilization is according to described accidental access response and the resource of appointment sends described connection and sets request signal again; And
Step D4, the reception of request signal is set again according to described connection in the wireless base station of managing described the 2nd sub-district, and send conflict and solve signal,
In described step D4, manage before the regulation timer expiration that the wireless base station of described the 2nd sub-district starts in described step D1, and promptly connect again setting signal and separate and send described conflict and solve signal for the described response signal of setting request signal again that is connected.
4. the 2nd sub-district is managed in a wireless base station, it is characterized in that, comprising:
Identifying unit, based on setting transaction identification information that comprises in the request signal and the combination that can determine the security parameter of the 1st sub-district and this travelling carriage again, judge the contextual information that whether stores this travelling carriage from the connection of mailing to the 2nd sub-district that the 1st sub-district, is set with the 1st travelling carriage reception that connects;
Obtain the unit, be judged to be by described identifying unit under the situation of the contextual information of not storing described travelling carriage,, obtain the contextual information of this travelling carriage from managing the wireless base station of described the 1st sub-district; And
Setup unit based on the contextual information of described travelling carriage, is set the 2nd of described the 2nd sub-district that is used for this travelling carriage with the cooperation of described travelling carriage and is connected,
Described transaction identification information is the identifying information that is updated under the situation that the change of the 1st structure that connects described in the described travelling carriage has been handled successfully.
5. wireless base station as claimed in claim 4 is characterized in that,
Comprise that connection sets the request signal receiving element again, according to the random access lead code that receives from described travelling carriage, described travelling carriage is sent accidental access response, and according to the reception of setting request signal from the described travelling carriage utilization described connection that the resource of appointment receives by this accidental access response again, send conflict and solve signal
Described connection was set the request signal receiving element again before described travelling carriage sends the regulation timer expiration that starts when described connection is set request signal again, and was connected the response signal of setting request signal again for this and promptly connected setting signal again and separate and send described conflict and solve signal.
6. as each described method of mobile communication of claim 1 to 3, it is characterized in that,
Even also comprise the steps: under the situation of the fault in not detecting described the 1st connection, the wireless base station of managing described the 1st sub-district is also in timing arbitrarily, to managing the wireless base station of described the 2nd sub-district, notify the up-to-date described transaction identification information in the described travelling carriage.
7. as claim 4 or 5 described wireless base stations, it is characterized in that,
Also comprise administrative unit,, upgrade the described transaction identification information corresponding with the contextual information of the described travelling carriage of storing according to the transaction identification information of notifying by the wireless base station of described the 1st sub-district of management.
8. the 1st sub-district is managed in a wireless base station, it is characterized in that, comprising:
Notification unit, when in described the 1st sub-district with travelling carriage between the change of the 1st structure that is connected set handle under the case of successful, upgrade transaction identification information, and, this transaction identification information after upgrading is notified to the wireless base station of management the 2nd sub-district arbitrarily regularly.
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- 2010-02-02 US US13/147,338 patent/US8565761B2/en not_active Expired - Fee Related
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- 2010-02-02 CN CN2010800062775A patent/CN102301787A/en active Pending
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014084005A1 (en) * | 2012-11-29 | 2014-06-05 | 株式会社Ｎｔｔドコモ | Mobile communication method, wireless base station, and mobile station |
| CN113825257A (en) * | 2014-01-30 | 2021-12-21 | 株式会社Ntt都科摩 | Mobile station and base station |
| WO2018171527A1 (en) * | 2017-03-24 | 2018-09-27 | Jrd Communication (Shenzhen) Ltd | Data transmission in rrc inactive state |
| CN110583043A (en) * | 2017-03-24 | 2019-12-17 | 捷开通讯(深圳)有限公司 | RRC INACTIVE state |
| CN110583043B (en) * | 2017-03-24 | 2022-03-25 | 捷开通讯(深圳)有限公司 | RRC INACTIVE state |
| CN107027190A (en) * | 2017-06-14 | 2017-08-08 | 武汉虹信通信技术有限责任公司 | A kind of Stochastic accessing contention resolved implementation method for LTE system |
| CN112105092A (en) * | 2019-06-17 | 2020-12-18 | 中兴通讯股份有限公司 | Method and device for processing data in dual-connection reestablishment |
| CN112105092B (en) * | 2019-06-17 | 2024-03-15 | 中兴通讯股份有限公司 | Method and device for processing data in double connection reestablishment |
| WO2020252709A1 (en) * | 2019-06-19 | 2020-12-24 | Oppo广东移动通信有限公司 | Wireless communication method, network device, and terminal device |
Also Published As
| Publication number | Publication date |
|---|---|
| US8565761B2 (en) | 2013-10-22 |
| US20120003977A1 (en) | 2012-01-05 |
| EP2393322A1 (en) | 2011-12-07 |
| JP2010199632A (en) | 2010-09-09 |
| WO2010087492A1 (en) | 2010-08-05 |
| JP5069704B2 (en) | 2012-11-07 |
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